The 'Other World' of Angel Beats- without the whole "becoming obliterated if you enjoy it here", or the fact that one's past must be extremely painful and could not life their youth enjoyably enough to get transported here wishing you could die.

It'd be nice to stay a high-school student forever with people you meet, having access to innumerable weapons and such, and not being able to die.
If some of the characters were there, I'd be laughing and enjoying my eternity.